In Pokémon Platinum, you would be able to catch Arceus in the Spear Pillar provided you have the Azure Flute before you beat Cynthia, the Pokémon League Champion for the first time however the Azure Flute cannot be found in the games and the Azure Flute was never distributed.
you fight your rival
either battle elite four member Lucian (the one before the champion). or trade your Kadabra.
the last person before the champion in the elite four has one, but i also remember seeing one somewhere else.
The rare Pokemon which you can get before the Elite Four in Pokemon Platinum are Giratina, Mesprit, Uxie, and Azelf.
No
they are always the same Pokemon :):):):):)
All the Pokemon from before. There are no additions or subtractions of Pokemon.
no.
every pokemon from that game and generations before
Absol is the Pokemon before Giratina. Absol's number in the pokedex is 209 and Giratina's number is 210. This is the one in the Pokemon platinum POKEDEX.
I haven't played Pokemon Platinum Version before
You have to start from resort area, then keep on going up until route 227 and theres the stark mountain. But of course, you have to beat the Pokemon champion before that